한국 성인에서 커피 섭취량과 혈중 요산 농도의 연관성: 2016년 국민건강영양조사 자료 이용

석지한,김현진,정래호 대한가정의학회 2020 Korean Journal of Family Practice Vol.10 No.3

Background: Coffee is one of the most commonly consumed beverages in the world. There is evidence that the consumption of coffee has a stronginfluence on health outcomes. However, the relationship between coffee consumption and serum uric acid in the Korean population is unclear. Inthis study, we investigated the relationship between coffee consumption and serum uric acid levels in Korean adults. Methods: This study included 2,966 adults aged ≥19 years who participated in the Korea National Health and Nutrition Examination Survey 2016. Theparticipants were divided into four groups according to the amount of coffee consumed and serum uric acid level. Linear regression analysis wasused to analyze the relationship between coffee consumption and serum uric acid level. Results: Serum uric acid level increased with increasing coffee consumption (P<0.001). After adjusting for all confounding factors, serum uric acid levelwas higher in the groups that consumed coffee daily, at more than four teaspoons, than in the groups that did not consume coffee (P<0.001). Conclusion: The findings of this study suggest that coffee consumption has a positive relationship with serum uric acid level. 연구배경: 커피는 세계적으로 가장 많이 소비되는 음료 중 하나로 커피 섭취가 건강에 많은 영향을 준다는 연구 결과가 있지만, 한국 인에 있어서 커피 섭취와 혈중 요산 수치와의 관계는 밝혀진 바가 없다. 본 연구에서는 정상 신기능을 가진 한국의 성인을 대상으로 커피와 혈중 요산 농도의 관계에 대해서 분석하고자 하였다. 방법: 2016년 국민건강영양조사에 참여한 19세 이상의 성인 중 조건 을 만족하는 2,966명을 대상으로 본 연구를 시행하였다. 식품 섭취 빈도 조사 설문지 응답에 따라 대상자를 커피를 섭취하지 않는 집 단, 2 teaspoon (ts) 미만으로 섭취하는 집단, 2 ts 이상 4 ts 미만 섭취 하는 집단, 4 ts 이상 섭취하는 집단으로 네 군으로 나누었고 혈중 요산 농도를 측정하였다. 커피 섭취와 혈중 요산 농도와의 연관성을 분석하기 위해 선형 회귀 분석을 사용하였다. 결과: 조사 대상자의 혈중 요산 농도는 평균 5.08±0.03 mg/dL이었으 며, 4 ts 이상 섭취군에서 5.34, 2 ts 이상 4 ts 미만군에서 5.08, 2 ts 미 만군에서 4.99, 미섭취군에서 4.91 mg/dL을 보였다. 일반적 특성과 건강 관련 특성을 보정한 회귀계수 유의성 검증 결과에서도 커피를 마시지 않는 군보다 하루 4 ts 이상 섭취군에서 혈중 요산 농도가 0.24 mg/dL만큼 높음을 알 수 있었다(P=0.006). 결론: 한국 성인에서 커피 섭취량이 많을수록 혈중 요산 농도는 유 의하게 높음을 확인할 수 있었다.

락토바실러스 루테리 섭취가 여성의 목 피부 보습과 주름개선에 미치는 영향

석지한,이자복,강상모 한국미용학회 2018 한국미용학회지 Vol.24 No.3

This study aimed to investigate the beneficial effects of Lactobacillus reuteri KCTC 3594 probiotics and paraprobiotics on the moisturization and wrinkle improvement of neck skin in women in their 30s–40s. For this investigation, a total of 30 participants were divided into the following three groups (10 participants each): control group (Cont), L. reuteri probiotic group (Pro), and L. reuteri paraprobiotic group (Para). L. reuteri was administered to each group (1×1010 CFU / capsule) on an empty stomach in the morning once a day for 12 weeks. After the 12-week intake of L. reuteri, no significant change in skin moisture content was observed in the Cont group, while a statistically significant increase was detected in the Pro and Para groups (p<0.001). Regarding wrinkle improvement, no statistically significant change was noted in the Cont group, while the Pro and Para groups revealed statistically significant declines (p<0.01 and p< 0.05, respectively). The obtained results revealed the following: moisture level and wrinkles improved in the Pro and Para groups. In the Pro group in particular, positive effects on wrinkles were identified . This study confirmed that the oral intake of L. reuteri is effective at slowing down the aging of neck skin and has a positive effect on the skin. It appears that such intake produced intrinsic changes in the skin by enhancing immunity in the intestines and skin. The results of this study confirm the usefulness of L. reuteri probiotics and paraprobiotics as potential cosmetics raw materials.

미세다륜침(MTS)관리가 여성의 미세주름 및 탄력개선에 미치는 효과

석지한,리순화 한국피부과학연구원 2010 대한피부미용학회지 Vol.8 No.3

The aim of this study was prove that the effect of skin's light wrinkle and elasticity with treating by MTS and Vitamin E together and the validity of the efficiency in MTS, which is typical feature of skin aging and propose the criteria for effective treatment method. The study objects were 16 women with age of 30's and 40's, who were laxity of their skin elasticity condition. The first experimental group women was treated by MTS(Micro needle Therapy System), the second experimental group women was treated by MTS and Vitamin E together, studying each 8 persons respectively. The study objects were treated once a week for total 6 times and put in 30 min. per one treatment. The measurement was checked by total 4 times such as before the treatment, after one time treatment, after 6 times treatment and 2 weeks later after the final treatment, which was measured light wrinkle, elasticity, moisture, smoothness and pores on skin condition respectively. As for the result, this study turned out that the application of MTS and Vitamin E treatment together was more effective than MTS only, which brought more effective improvement for wrinkle, elasticity, moisture ratio and smoothness. As questioning about the condition of skin after treatment, we got a positive response in terms of applying for MTS and Vitamin E treatment together, which will be effectively considered for skin aging improvement program in the future. 본 연구는 미세다륜침(MTS)의 유효성에 대한 검증과 미세다륜침(MTS)과 비타민 E제품을 병행하였을 때 피부의 미세주름 및 탄력개선에 미치는 영향에 대해 알아보고 그 효과적인 관리방법의 기준을 제시하고자 하였다. 피부 탄력상태가 저하된 30, 40대 중년여성 16명을 선정하여 MTS를 실시한 8명은 MTS군, MTS와 비타민 E를 동시에 실시한 8명은 MTS+비타민 E군으로 명명하여, 실험을 진행하였다. 실험은 주 1회 총 6회 관리로, 1회 관리 시간은 총 30분 동안 시행하였다. 측정은 실험 전, 실험 1회 후, 실험 6회 후, 실험 종료 2주 후로 총 4회에 걸쳐 미세주름, 탄력도, 수분도, 거칠기, 모공 등의 피부상태를 측정하였다. 측정 결과 MTS만 단독으로 시행하였을 때 보다 MTS와 비타민 E 제품을 같이 시행하였을 때 미세주름, 탄력도, 수분도, 거칠기 개선에 효과가 큰 것으로 나타나 MTS+비타민 E관리가 미세주름 및 탄력개선 등 피부 노화개선에 효율적인 피부 관리 프로그램 방법으로 적용이 가능할 것으로 사료된다.

비대면 쌍방향 실시간 교육환경에서 학습자가 인식한 평생교육기관 강사의 교수행동과 학습전이와의 관계

석지나,조인철,조대연 고려대학교 HRD정책연구소 2023 휴먼웨어 연구 Vol.6 No.1

본 연구의 목적은 비대면 쌍방향 실시간 교육환경에서 학습자가 인식한 평생교육기관 강사의 교수행동과 학습전이와의 관계를 실증적으로 검증하는 것에 있다. 이를 위해 경기 동부지역의 평생교육기관에서 직업능력 함양을 위한 프로그램을 수료한 학습자 283명을 대상으로 변수 간의 관계를 분석하여 다음과 같은 연구 결과를 도출할 수 있었다. 첫째, 비대면 쌍방향 실시간 교육환경에서 학습시간이 증가할수록 학습전이가 높아진다. 둘째, 학습시간을 통제했을 때, 비대면 쌍방향 실시간 교육환경에서 평생교육기관 강사의 교수행동이 높을수록 학습전이가 높아진다. 세부적으로 열정, 과업지향, 유대감이 높을수록 학습전이가 높아진다. 이러한 연구 결과를 바탕으로 시사점에 대해 논의하였다.

락토바실러스 루테리(Lactobacillus reuteri)의 Probiotics와 Paraprobiotics 제제 섭취에 따른 30-40대 여성의 피부미용효과

석지한 ( Ji-han Suk ),강상모 ( Sang-mo Kang ) 한국미용학회 2018 한국미용학회지 Vol.24 No.2

This research was performed to find out the influences of Lactobacillus reuteri KCTC 3594 intake on skin conditions of middle-aged women(40±5 years old) for 12 weeks(from June 12 to September 2). Thirty female volunteers were randomly divided into the three groups of 10 people; control group(hereinafter referred to as Cont), L. reuteri probiotics group(Pro) and L. reuteri paraprobiotics group(Para). Each subject has been directed to intake one capsule of L. reuteri(1×10¹⁰ CFU / capsule), a day for the 12 week-period. After the 12-week treatment, Cont group showed a decrease in moisture content(p<.05) but it increased both in Pro group(p<.001) and Para group(p<.001). The sebum content showed a tendency to increase in Cont group and increased both for Pro group(p<.01) and Para group(p<.001). The level of skin roughness increased in Cont group(p<.05) but decreased in two other groups; Pro group(p<.001), and Para group(p<.01). The amount of skin wrinkle has increased in Cont group(p<.05) but decreased in two other groups; Pro group(p<.001), and Para group(p<.05). Comprehensively, the experiment indicates that the intake of probiotics and paraprobiotics is effective in improving skin health and Pro group showed better result than Para group. Therefore, the result implies that intake of L. reuteri induced intestinal immune balance and consequently intrinsic skin change and L. reuteri probiotics and paraprobiotics are expected to be used as a beauty cosmetic food.

Lactobacillus reuteri 섭취가 여성의 안면 피부상태에 미치는 영향

석지한 ( Ji-han Suk ),박정아 ( Jeong-a Park ),강상모 ( Sang-mo Kang ) 한국미용학회 2018 한국미용학회지 Vol.24 No.4

Probiotics has drawn a great attention as an inner-beauty material, and its diverse effects through intestinal immunity balance have been reported. The study aims to examine the effects of Lactobacillus reuteri KCTC 3594 intake on skin health of 30-40 middle-aged women in a 12-week treatment. Thirty female volunteers were randomly divided into the three groups of 10 people; control group(hereinafter referred to as Cont), L. reuteri probiotics group(Pro) and L. reuteri paraprobiotics group(Para). L. reuteri was administered to each group (1×10¹⁰ CFU/capsule) on an empty stomach in the morning once a day for 12 weeks. After 12-week intake of L. reuteri, the amount of melanin was increased in all groups with statistical significance(p<.001) while no change was found in all groups in terms of facial erythema. Regarding TEWL, no significant change was observed in a Cont group while a statistically significant decrease was detected in Pro and Para groups(p<.001, p<.05). In terms of skin depression, no significant change occurred in a Cont group while a statistically significant decline was found in both Pro and Para groups(p<.01, p<.05). In overall, Pro and Para groups were effective in improving TEWL and skin depression. In terms of significant difference, a Pro group was greater than a Para group. This study confirmed that L. reuteri probiotics and paraprobiotics would be useful as an inner-beauty material which can strengthen skin health.

국내 LNG벙커링 시범사업을 위한 경제성 분석

조상훈(Sanghoon Cho),석지나(Jina Suk),김익수(Iksoo Kim) 한국가스학회 2016 한국가스학회 학술대회논문집 Vol.2016 No.6

한국인 탈색모발에 블루계열 염색 시 지렁이 자가분해물의 처리 효과

박정아 ( Jeong-a Park ),석지한 ( Ji-han Suk ),강상모 ( Sang-mo Kang ) 대한미용학회(구 대한미용과학회) 2018 대한미용학회지 Vol.14 No.2

In Korean hair, blue-dyeing causes severe hair damage due to a pre-bleaching step. Due to such damage, color retention period of the hair becomes very short. The prsent study aimed to address this problem, and to this end, samples were prepared as follows: blue-dyed hair (control group), dyed hair after pre-treatment with earthworms autolysate on bleached hair (pre-group), dyed hair with a mixture of dye and earthworms autolysate (mixed group). After blue-dyeing bleached hair once and 3 times, L^*a^*b^* values measured to examine the color retention after shampoo application, at frequency once, 10 times, 20 times. For blue-dyeing, the hair was dyed well, where a^* was close to ‘0’ in proportion to b^* as brightness (L^*) and yellow (b^*) were relatively low. L^*a^*b^* values were found to be highest in a pre-group when bleached hair (once, 3 times) was blue-dyed and shampooed up to 20 times while the color retention was the best in the pre- and mixed-groups. In regard to the dependence of color retention on shampoo frequency, the pre-group was more than 3 times greater than the control group and mixed-group. In terms of ‘dyeing uniformity’, ‘vividness’, ‘glossiness’ and ‘smoothness’, the pre-treated group was the best for both one-time and 3-times bleached hair. With respect to ‘texture roughness’, the control group was the highest. Regarding ‘hair dye deodorization effects’, the mixed group was the greatest. Just like the spectrophotometer measurement, the pre-treated group was the best at an expert group questionnaire. Since the earthworms autolysate treatment was found to enhance hair coloration and color durability during blue hair dyeing, it is reasonable to say that such treatment is commercially valuable.

락토바실러스 람노서스(Lactobacillus rhamnosus) KCTC 5033의 Probiotics와 Paprobiotics 섭취에 의한 얼굴미용효과

이자복 ( Ja Bok Lee ),석지한 ( Ji Han Suk ),강상모 ( Sang Mo Kang ) 대한미용학회(구 대한미용과학회) 2018 대한미용학회지 Vol.14 No.3

Lactic acid bacteria are often taken in the form of yogurt-which is becoming a highly stable food type often consumed daily-or medicine. Lactic acid bacteria have a significant industrial value because of the various reports of health improvement effects that they may convey (eg, anti-microbial, improved immunity). This study examined changes in facial skin when middle-aged women (ie, 40~50s) took probiotic and para-probiotic medicines derived from Lactobacillus rhamnosus KCTC 5033. The research subjects were 30 middle-age women who were randomly assigned (10 per group) to consume either: i) probiotics of L. rhamnosus KCTC 5033, ii) bacteria-killing paraprobiotics, or, iii) a control. Each group consumed 1 capsule (1×1010 CFU or more) of assigned treatment on an empty stomach every morning for 12 weeks, and changes in their facial and neck skin before and after consumption were observed. Their skin change, melanin index, erythema index, moisture content, TEWL, skin roughness, and skin surface temperature were measured to identify any potential differences. A survey was also used to investigate respondent’s satisfaction with their skin before and after lactic acid bacteria intake on a 5-point Likert scale. Before and after results demonstrated that melanin index significantly increased in only the control group while moisture content increased significantly in the probiotics and paraprobiotics groups. Also in the probiotics and parabiotics groups, moisture content increased, while skin roughness decreased. Also in the probiotics and parabiotics groups: i) moisture content increased, ii) skin roughness decreased, and iii) no changes (before to after) in erythema index, TEWL or skin surface temperature were observed. The results of probiotics and paraprobiotics on neck skin indicated that the control group experienced a significant increase in melanin index, skin roughness, and TEWL; moisture content increased significantly in the probiotics and paraprobiotics groups, and skin surface temperature increased significantly in only the probiotics group.

LNG연료추진 선박용 고망간강 LNG 연료탱크 개발

조상훈(Sanghoon Cho),김익수(Iksoo Kim),석지나(Jina Suk),심명지(Myungji Sim),류차원(Chawon Ryu) 한국가스학회 2016 한국가스학회 학술대회논문집 Vol.2016 No.11